CAB1 — Cucumis sativus

Summary

CsCAB1 (CSA_6G522680) encodes a chlorophyll a/b-binding protein of the light-harvesting complex, localised to the thylakoid membrane and photosystems I and II. The gene is associated with chlorophyll binding, xanthophyll binding, and multiple activities in chlorophyll metabolism, including chlorophyll b reductase, pheophytinase, and RCC reductase activities. It is linked to photosynthesis, light harvesting in both photosystems, pigment and chlorophyll metabolism, chlorophyll breakdown, and responses to low light, desiccation, herbicide, and drought. Associations with agronomic traits include chlorophyll content and ratio, net photosynthetic rate, quantum yield, leaf color, leaf yellowing tolerance, bacterial blight disease resistance, stomatal opening and resistance, root length, protein and starch content, and responses to high and low temperature stress. Studies of related genes in other species connect the family to thylakoid biogenesis, non-photochemical quenching, photoprotection, drought tolerance, and stay-green phenotypes.